I second that. When the bike is in 2 wheel drive, you don't even know that it is there. When you get in the mud and put it in 4 wheel drive it just pulls. It really works when you need it the most. When you are in a bind and one of the front wheels is off the ground, the bike never hesitates, just keeps pullin. I love it. Next to the tires, I think it is the best mod you can do to your bike.